<template>
  <div class="container">
    <div class="p16">
      <el-form ref="form" :model="form" label-width="110px">
      <div style="width:800px">
          <el-form-item label="标题文字">
            <el-input v-model="form.title"></el-input>
          </el-form-item>
          <el-form-item label="标题强调文字">
            <el-input v-model="form.subtitle"></el-input>
          </el-form-item>
      </div>
        <div class="banner">
          <div class="pt16 pb16">
            <el-button type="primary" plain @click="handleAddBanner" icon="el-icon-edit">添加轮播图</el-button>
          </div>
          <el-table
            :data="form.urlList"
            style="width: 100%">
            <el-table-column
                type="index"
                label="序号"
                width="50">
                </el-table-column>
            <el-table-column
              prop="title"
              label="标题文字"
              show-overflow-tooltip
              width="250">
            </el-table-column>
            <el-table-column
              prop="subtitle"
              label="内容文字"
              show-overflow-tooltip
              >
            </el-table-column>
            <el-table-column
              prop="address"
              width="180"
              label="背景图">
              <template slot-scope="scope">
                <img v-if="scope.row.url" :src="scope.row.url" @click="handlePictureCardPreview(scope.row.url)" style="width:100px;height:50px" alt="">
              </template>
            </el-table-column>
            <el-table-column
              label="操作"
              width="100">
              <template slot-scope="scope">
                <el-link :underline="false" @click="handleEditRow(scope.row,scope.$index)">修改</el-link>
                <el-link :underline="false" @click="handleDeleteRow(scope.row,scope.$index)">删除</el-link>
              </template>
            </el-table-column>
          </el-table>
        </div>
        <div class="save">
          <el-button type="primary" @click="handleSave">保存</el-button>
        </div>
      </el-form>
    </div>
    <el-dialog :title="itemForm.id?'修改'+'轮播图':'添加'+'轮播图'" :close-on-click-modal="false" :visible.sync="isShow"
      custom-class="comDialog" width="30%">
      <div class="dialogDody">
        <el-form ref="passForm"  label-width="100px" :model="itemForm" class="">
          <el-form-item label="标题文字">
            <el-input v-model="itemForm.title"></el-input>
          </el-form-item>
          <el-form-item label="内容文字">
            <el-input v-model="itemForm.subtitle"></el-input>
          </el-form-item>
          <el-form-item label="轮播图片">
            <el-upload
              action=""
              list-type="picture-card"
              :http-request="(file)=>handleCustomUpload(file)"
              :show-file-list="false"
            >
              <div class="modelBox" v-if="itemForm.url" @click.stop>
                <div class="model">
                  <i class="el-icon-zoom-in" @click="handlePictureCardPreview(itemForm.url)"></i>
                  <i class="el-icon-delete" @click="handleDeleteUpload"></i>
                </div>
                <img  :src="itemForm.url" class="el-upload--picture-card" />
              </div>
              <i slot="default" class="el-icon-plus" v-else></i>
            </el-upload>
            <div class="tips">请上传jpg、png格式，尺寸建议为900px*470px</div>
          </el-form-item>
        </el-form>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button size="mini" @click="isShow=false">取 消</el-button>
        <el-button element-loading-spinner="el-icon-loading" type="primary"
          size="mini" @click="handleBannerSave">保存</el-button>
      </span>
    </el-dialog>
    <el-image-viewer
      v-if="isShowImgView"
      :url-list="dialogImageUrl"
      :initial-index="0"
      :on-close="closeViewer"
      :z-index="3000"
    />
  </div>
</template>
<script>
  import {
    arraySort
  } from "@/utils";
  import naTable from "@/components/naTable";
  import {
    mapGetters
  } from "vuex";
  export default {
    name: "Materiel",
    components: {
      "el-image-viewer": () =>
      import("element-ui/packages/image/src/image-viewer"),
    },
    data() {
      return {
        form: {
        },
        urlView:[],
        dialogImageUrl:[],
        isShowImgView:false,
        rowIndex:0,
        isShow:false,
        state:'',
        itemForm:{
          title:'',
          subtitle:'',
          url:''
        },
        copyItemForm:{}
      };
    },
    computed: {
      ...mapGetters(["name"]),
    },
    created() {
    },
    mounted() {
      this.getData()
      this.copyItemForm = JSON.parse(JSON.stringify(this.itemForm))
    },
    methods: {
      getData(){
        this.$api.system.GetList(2).then((res)=>{
        this.form = res[0]
        })
      },

      //保存
      handleSave(){
        this.$api.system.Update(this.form).then(res=>{
          this.$message.success('保存成功！')
          this.getData()
        })
      },

      //预览
      handlePictureCardPreview (file) {
        this.dialogImageUrl = []
        this.dialogImageUrl.push(file)
        this.isShowImgView = true
      },

      //删除文件
      handleDeleteUpload(){
        this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          this.itemForm.url = ''
          this.$message({
            type: 'success',
            message: '删除成功!'
          });
        }).catch(() => {
        });
      },

      //关闭预览
      closeViewer(){
        this.isShowImgView = false
      },

      //添加轮播图
      handleAddBanner(){
        this.state = 'add'
        this.itemForm = JSON.parse(JSON.stringify(this.copyItemForm))
        this.isShow = true
      },

      //修改
      handleEditRow(row,index){
        this.state = 'edit'
        this.itemForm = JSON.parse(JSON.stringify(row))
        this.rowIndex = index
        this.isShow = true
      },

      //删除
      handleDeleteRow(row,index){
        this.$confirm('此操作将永久删除该数据, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          this.form.urlList.splice(index,1)
          this.$message({
            type: 'success',
            message: '删除成功!'
          });
        }).catch(() => {
        });
      },

      //保存轮播图
      handleBannerSave(){
        if(this.state == 'edit'){
          this.form.urlList.splice(this.rowIndex,1,this.itemForm)
          this.isShow = false
          this.$message.success('修改成功！')
        }else{
          this.form.urlList.push(this.itemForm)
          this.isShow = false
          this.$message.success('添加成功！')
        }
      },

      //上传文件
      handleCustomUpload(e){
        const file = e.file;
        const type = file.name.substring(file.name.lastIndexOf(".") + 1);
        if (
          type !== "png" &&
          type !== "jpg" &&
          type !== "jpeg" &&
          type !== "gif" &&
          type !== "bmp"
        ) {
          this.$message.error("上传图片格式错误，请重新上传!");
          return false;
        } else {
            var formData = new FormData();
              formData.append("file", file);
              formData.append("output", 'json2');
              this.$api.system.upload(formData).then((res) => {
                let prefix = '/assets'
                this.itemForm.url = prefix+res.src
                this.itemForm.name = res.src.substring(res.src.lastIndexOf('/')+1)
                this.itemForm.isDocument = false
                this.$message.success("上传成功！");
              });
        }
      },
    },
  };

</script>
<style lang="scss" scoped>
.container::v-deep{
  $sizeWidth:148px;
  $sizeHeight:100%;
  margin-bottom: 8px;
  .save{
    margin-top: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .head{
    padding-left: 16px;
    display: flex;
    align-items: center;
    height: 40px;
    background-color: rgba(253, 240, 255, 1);
    color: rgba(51, 51, 51, 1);
  }
  .tips{
    font-size:13px;
    color:rgba(153, 153, 153, 1);
  }
  .modelBox{
    .model{
      display: none;
      position: absolute;
      left: 0;
      top: 0;
      right: 0;
      bottom: 0;
      background-color: rgba(0, 0, 0, 0.5);
      z-index: 2;
      >*{
        font-size: 20px;
        color: #fff;
        &:hover{
          color: #3f61f1;
        }
        &:not(:last-child){
          margin-right: 8px;
        }
      }
    }
    &:hover{
      .model{
        display: flex;
        align-items: center;
        justify-content: center;
      }
    }
  }
  .el-upload{
    width: #{$sizeWidth};
    height: #{$sizeHeight};
    position: relative;
    .tag{
      position: absolute;
      left: 0;
      top: 0;
      padding: 4px 6px;
      line-height: 1.2em;
      background: rgba(0, 0, 0, 0.75);
      color: #fff;
      font-size: 12px;
      border-radius: 6px 0 4px 0;
      z-index: 2;
    }
  }
  .img_box{
    width: #{$sizeWidth};
    height: 150px ;
    position: relative;
    img{
      max-width: 100%;
      height: 100%;
    }
  }
  .img_boxMore{
    display: flex;
    flex-wrap: wrap;
    margin-right: -8px;
    margin-bottom: -8px;
    .img_box{
      border-radius:8px;
      border: 1px #dcdfe6 solid;
      overflow: hidden;
      margin-right: 8px;
    }
    >*{
      margin-right: 8px;
      margin-bottom: 8px;
    }
  }
}

</style>
